[PATCH v2 8/8] ufs: host: mediatek: Support new feature for MT6991

[<peter.wang@mediatek.com>]

From: Naomi Chu <naomi.chu@mediatek.com>

Add support for the MT6991 platform by enabling MRTT settings
and random performance improvements. These enhancements aim
to optimize performance and efficiency on the MT6991 hardware.

Enable multi-Round Trip Time (MRTT) for improved data handling.
Enable random performance improvement features to boost
overall system responsiveness.

Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Naomi Chu <naomi.chu@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
---
 drivers/ufs/host/ufs-mediatek.c | 6 ++++++
 drivers/ufs/host/ufs-mediatek.h | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 8498e95e263a..eee56f5aed30 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -289,6 +289,12 @@ static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
 				0x453000, REG_UFS_MMIO_OPT_CTRL_0);
 		}
 
+		if (host->ip_ver >= IP_VER_MT6991_A0) {
+			/* Enable multi-rtt */
+			ufshcd_rmwl(hba, MRTT_EN, MRTT_EN, REG_UFS_MMIO_OPT_CTRL_0);
+			/* Enable random performance improvement */
+			ufshcd_rmwl(hba, RDN_PFM_IMPV_DIS, 0, REG_UFS_MMIO_OPT_CTRL_0);
+		}
 	}
 
 	return 0;
diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h
index f96fd032371d..9747277f11e8 100644
--- a/drivers/ufs/host/ufs-mediatek.h
+++ b/drivers/ufs/host/ufs-mediatek.h
@@ -20,6 +20,9 @@
 #define MCQ_MULTI_INTR_EN       BIT(2)
 #define MCQ_CMB_INTR_EN         BIT(3)
 #define MCQ_AH8                 BIT(4)
+#define MON_EN                  BIT(5)
+#define MRTT_EN                 BIT(25)
+#define RDN_PFM_IMPV_DIS        BIT(28)
 
 #define MCQ_INTR_EN_MSK         (MCQ_MULTI_INTR_EN | MCQ_CMB_INTR_EN)
 
-- 
2.45.2